// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
}

// --- Enums ---

enum MemberRole {
  OWNER
  EDITOR
  MEMBER_PLAN_ONLY
  MEMBER_PHOTO_ONLY
  VIEWER_EXTERNAL
}

enum ExpenseCategory {
  LODGING
  DINING
  TRANSPORT
  OTHER
}

enum TriggerType {
  AUTO_BY_TIME
  MANUAL_BY_USER
}

enum PrivacyLevel {
  PUBLIC_IN_TOUR
  PRIVATE_OWNER
}

// --- Models ---

model User {
  id            Int           @id @default(autoincrement())
  email         String        @unique
  passwordHash  String
  name          String?
  avatar        String?
  createdAt     DateTime      @default(now())
  isAdmin       Boolean       @default(false)
  
  createdTours  Tour[]        @relation("TourCreator")
  tourMemberships TourMember[]
  uploadedPhotos Photo[]
}

model Tour {
  id          Int          @id @default(autoincrement())
  title       String
  startDate   DateTime?
  endDate     DateTime?
  createdAt   DateTime     @default(now())
  
  creatorId   Int
  creator     User         @relation("TourCreator", fields: [creatorId], references: [id])
  
  members     TourMember[]
  legs        Leg[]
  tasks       Task[]
  photos      Photo[]
}

model TourMember {
  tourId      Int
  userId      Int
  role        MemberRole   @default(MEMBER_PLAN_ONLY)

  tour        Tour         @relation(fields: [tourId], references: [id], onDelete: Cascade)
  user        User         @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@id([tourId, userId])
}

model Leg {
  id             Int       @id @default(autoincrement())
  tourId         Int
  sequenceNumber Int
  notes          String?   @db.Text

  tour           Tour      @relation(fields: [tourId], references: [id], onDelete: Cascade)
  places         Place[]
  expenses       Expense[]
  tasks          Task[]
}

model Place {
  id              Int       @id @default(autoincrement())
  legId           Int
  name            String
  address         String?
  
  // Sử dụng Float cho Lat/Lng để dễ thao tác ở Frontend. 
  // Nếu bạn muốn dùng PostGIS chuyên sâu, có thể dùng Unsupported("geography(Point, 4326)")
  latitude        Float
  longitude       Float
  
  sequenceInLeg   Int
  arrivalTime     DateTime?
  departureTime   DateTime?

  leg             Leg       @relation(fields: [legId], references: [id], onDelete: Cascade)
  expenses        Expense[]
  photos          Photo[]
}

model Expense {
  id          Int             @id @default(autoincrement())
  legId       Int
  placeId     Int?
  category    ExpenseCategory
  amount      Decimal         @db.Decimal(15, 2)
  currency    String          @default("VND")
  description String?         @db.Text

  leg         Leg             @relation(fields: [legId], references: [id], onDelete: Cascade)
  place       Place?          @relation(fields: [placeId], references: [id], onDelete: Cascade)
}

model Task {
  id               Int          @id @default(autoincrement())
  tourId           Int
  legId            Int?
  title            String
  plannedTimestamp DateTime
  isCompleted      Boolean      @default(false)
  completedAt      DateTime?
  triggerType      TriggerType  @default(MANUAL_BY_USER)

  tour             Tour         @relation(fields: [tourId], references: [id], onDelete: Cascade)
  leg              Leg?         @relation(fields: [legId], references: [id])
}

model Photo {
  id           Int          @id @default(autoincrement())
  tourId       Int
  placeId      Int?
  uploaderId   Int
  imageUrl     String
  capturedAt   DateTime     @default(now())
  privacyLevel PrivacyLevel @default(PUBLIC_IN_TOUR)

  tour         Tour         @relation(fields: [tourId], references: [id], onDelete: Cascade)
  place        Place?       @relation(fields: [placeId], references: [id], onDelete: SetNull)
  uploader     User         @relation(fields: [uploaderId], references: [id])
}